Oxygen content monitoring and adjusting device of ternary precursor synthesis equipment

Abstract

The utility model relates to an oxygen content monitoring and adjusting device, and provides the oxygen content monitoring and adjusting device of ternary precursor synthesis equipment, which comprises a reaction kettle, an end cover, a control panel, an oxygen detector and the like, a reaction cavity for accommodating reaction materials is formed in the reaction kettle, a control panel is arranged on one side of the front part of the reaction kettle, and an end cover is mounted at the upper part of the reaction kettle; an oxygen detector is mounted on the end cover, and the detection end of the oxygen detector extends into the reaction cavity in the reaction kettle. According to the utility model, the oxygen detectors distributed at multiple points are used for monitoring the oxygen concentration of each area in the reaction kettle, and the linkage mechanism is driven to synchronously adjust the opening degree of the nitrogen / oxygen valve in combination with the real-time processing of the numerical control unit in the control panel to form a closed-loop control loop of'detection-analysis-adjustment '; the defects of hysteresis of manual sampling detection and inaccurate manual adjustment are overcome, and the oxygen concentration in the oxidation reaction process is ensured to be stable.

Description

Technical Field

[0001] The utility model relates to an oxygen content monitoring and regulating device, in particular to an oxygen content monitoring and regulating device for ternary precursor synthesis equipment. Background Art

[0002] In the preparation of lithium-ion battery materials, the degree of oxidation of the ternary precursor significantly affects key battery properties such as capacity and cycle life. Therefore, during its synthesis, it is crucial to precisely control the oxygen content to ensure the stability of the oxidation quality. In existing technologies, the process for synthesizing ternary precursors generally involves mixing the raw materials in a reactor, manually observing the reaction state, and manually adjusting the oxygen valve to control the amount of oxygen injected based on experience. At the same time, regular manual sampling and testing are performed to obtain oxygen concentration data. If the concentration is not appropriate, it is adjusted through methods such as nitrogen dilution to complete the precursor oxidation process.

[0003] However, this process and structure have significant flaws. Manual sampling cannot reflect the oxygen concentration in the reactor in real time, resulting in significant lag and large errors in the test results. Manual adjustment of the oxygen valve makes it difficult to achieve precise quantitative control, often leading to large fluctuations in oxygen concentration. The entire process lacks an effective closed-loop feedback mechanism, and the previous adjustment cannot be promptly corrected according to real-time concentration changes. This leads to significant differences in product quality between batches, making it difficult to meet the needs of stable production. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide an oxygen content monitoring and regulating device for a ternary precursor synthesis device.

[0005] The technical implementation scheme of the utility model is: an oxygen content monitoring and regulating device for a ternary precursor synthesis device, comprising a reactor, an end cover, a control panel, an oxygen detector, a gas guide seat, a nitrogen inlet pipe, an oxygen inlet pipe, a gas valve and a rotating handle; a reaction cavity for accommodating the reaction materials is provided inside the reactor, a control panel is provided on one side of the front of the reactor, and an end cover is installed on the upper part of the reactor; an oxygen detector is installed on the end cover, and the detection end of the oxygen detector extends into the reaction cavity inside the reactor to monitor the oxygen content during the reaction. The concentration changes; a gas guide seat is provided on one side of the top of the end cover. The gas guide seat is a hollow structure and is connected to the internal space of the reactor for introducing the gases required for the reaction; the gas guide seat is connected and connected to the nitrogen inlet pipe and the oxygen inlet pipe. The gas paths of the nitrogen inlet pipe and the oxygen inlet pipe are both provided with gas valves, and the gas valves are both provided with handles. By rotating the handle angles, the gas path openings in the corresponding pipelines can be adjusted; a linkage mechanism is provided on the end cover, which is used to synchronously rotate the gas valve handles on the nitrogen inlet pipe and the oxygen inlet pipe to simultaneously adjust the gas path openings of the two.

[0006] Optionally, the linkage mechanism includes an electric cylinder, a push rod, a push block and a connecting rod. An electric cylinder is provided on the side of the end cover close to the nitrogen inlet pipe. The end of the driving rod of the electric cylinder is fixedly connected to the push rod, and the push rod consists of a connecting block and a limit frame; a push block is provided at the lower part of the rotating handle of the air valve on the nitrogen inlet pipe, and the lower end of the push block is embedded in the limit frame. When the driving rod of the electric cylinder performs a telescopic movement, the rotating handle on the nitrogen inlet pipe is driven to rotate by the push rod; the rotating handle of the air valve on the oxygen inlet pipe and the upper part of the rotating handle of the air valve on the nitrogen inlet pipe are hingedly connected by a connecting rod. When the rotating handle on the nitrogen inlet pipe rotates, the rotating handle on the oxygen inlet pipe is driven to rotate synchronously in the opposite direction or in the same direction by the connecting rod, thereby realizing the linkage adjustment of the air path opening of the two.

[0007] Optionally, multiple oxygen detectors are provided to detect different areas inside the reactor respectively, so as to obtain the oxygen concentration distribution state inside the reactor.

[0008] Optionally, it also includes a gas guide seat 2, a glass tube, a float, a fan-shaped scale plate and a pointer. The gas guide seat 2 is installed on the side of the end cover away from the gas guide seat 1. The structure of the gas guide seat 2 is consistent with that of the gas guide seat 1. A glass tube is vertically provided on the gas guide seat 2. The interior of the glass tube is connected with the internal space of the gas guide seat 2, and a float is floatingly provided in the glass tube; a fan-shaped scale plate is fixedly installed on the upper part of each air valve, and an angle scale is set on the fan-shaped scale plate for marking the precise position of the valve opening; a pointer is provided on each turning handle, and the pointer points to the corresponding scale of the fan-shaped scale plate on the same air valve to indicate the specific opening angle of the current air circuit valve.

[0009] Optionally, a perforated air membrane is further included, and a perforated air membrane is provided at the lower inner portion of the air guide seat.

[0010] The utility model has the following advantages: 1. The utility model monitors the oxygen concentration in each area of ​​the reactor through multi-point distributed oxygen detectors, combines the real-time processing of the detection data by the numerical control unit in the control panel, drives the linkage mechanism to synchronously adjust the opening of the nitrogen / oxygen valve, and forms a "detection-analysis-adjustment" closed-loop control circuit, overcomes the defects of manual sampling detection lag and manual adjustment inaccuracy, and ensures the stability of the oxygen concentration during the oxidation reaction process.

[0011] 2. The utility model sets a linkage mechanism, which analyzes the oxygen concentration and realizes synchronous reverse linkage adjustment of the nitrogen valve and the oxygen valve through the linkage mechanism. For example, when the oxygen concentration needs to be reduced, the nitrogen flow rate is increased to form a stable and reliable gas ratio control.

[0012] 3. The utility model sets a perforated air membrane at the lower inner part of the air guide seat, which can absorb pressure fluctuations through the deformation of the diaphragm when the gas flow changes suddenly, reduce overshoot during the adjustment process, and further improve the stability of oxygen concentration control. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0014] Figure 2 This is a schematic diagram of the three-dimensional structure of the gas guide seat, nitrogen inlet pipe and linkage mechanism of the utility model.

[0015] Figure 3 It is a three-dimensional structural diagram of the linkage mechanism and the rotating handle of the utility model.

[0016] The meanings of the reference numerals in the figure are as follows: 1: reactor, 2: end cover, 21: control panel, 3: oxygen detector, 4: gas guide seat 1, 41: air membrane with holes, 5: nitrogen inlet pipe, 6: oxygen inlet pipe, 61: air valve, 62: turning handle, 7: electric cylinder, 71: push rod, 72: top block, 73: connecting rod, 8: gas guide seat 2, 81: glass tube, 82: float, 9: sector scale plate, 91: pointer. DETAILED DESCRIPTION

[0017] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby stated that any directional terms such as "up," "down," "left," "right," "front," "back," "inside," and "outside" that appear or will appear in this document are based solely on the accompanying drawings and are not intended to limit the present invention.

[0018] Example 1

[0019] An oxygen content monitoring and regulating device for a ternary precursor synthesis device, such as Figure 1-3 As shown, it includes a reactor 1, an end cover 2, a control panel 21, an oxygen detector 3, a gas guide seat 4, a nitrogen inlet pipe 5, an oxygen inlet pipe 6, a gas valve 61 and a rotating handle 62. A reaction cavity for accommodating reaction materials is provided inside the reactor 1. A control panel 21 is provided on one side of the front of the reactor 1. A numerical control unit, a data processing unit, a drive unit and a preset control program are provided in the control panel 21. A stirring member is provided on the end cover 2. An oxygen detector 3 is provided on the end cover 2. The detection end of the oxygen detector 3 extends into the reaction cavity inside the reactor 1 to monitor changes in oxygen concentration during the reaction process. There are multiple oxygen detectors, and the multiple oxygen detectors 3 respectively detect different areas inside the reactor 1, which can fully obtain the oxygen concentration distribution state in the reactor 1 to avoid local concentration deviation affecting the adjustment accuracy;

[0020] Among them, the data processing unit of the control panel 21 is electrically connected to the oxygen detector 3 to receive the oxygen concentration detection signal of each area, and the numerical control unit is electrically connected to the data processing unit and the drive unit respectively; an air guide seat 4 is provided on one side of the top of the end cover 2, and the air guide seat 4 is a hollow structure and is connected to the internal space of the reactor 1. The air guide seat 4 is connected and connected to the nitrogen inlet pipe 5 and the oxygen inlet pipe 6. The gas paths of the nitrogen inlet pipe 5 and the oxygen inlet pipe 6 are both provided with air valves 61. The air valves 61 adopt a butterfly valve structure, and the opening of their valve plates is linearly related to the rotation angle of the handle 62. The air valves 61 are each provided with a handle 62, and the opening of the air path in the corresponding pipeline is adjusted by rotating the angle of the handle 62; a linkage mechanism is provided on the end cover 2, and the linkage mechanism is used to synchronously rotate the handles 62 of the air valves 61 on the nitrogen inlet pipe 5 and the oxygen inlet pipe 6 to simultaneously adjust the air path openings of the two;

[0021] like Figure 1-3 As shown, the linkage mechanism includes an electric cylinder 7, a push rod 71, a top block 72 and a connecting rod 73. An electric cylinder 7 is provided on the side of the end cover 2 close to the nitrogen inlet pipe 5. The end of the driving rod of the electric cylinder 7 is fixedly connected to the push rod 71. The push rod 71 consists of a connecting block and a limit frame. The inner side of the limit frame is provided with a card slot adapted to the top block 72 to ensure that the top block 72 is stably embedded and moves synchronously with the push rod 71; a top block 72 is provided at the lower part of the rotating handle 62 of the air valve 61 on the nitrogen inlet pipe 5, and the lower end of the top block 72 is embedded in the limit frame. When the driving rod of the electric cylinder 7 performs a telescopic action, the rotating handle 62 on the nitrogen inlet pipe 5 is driven to rotate by the push rod 71 to adjust the opening of the air valve 61 of the nitrogen inlet pipe 5; the rotating handle 62 of the air valve 61 on the oxygen inlet pipe 6 and the upper part of the rotating handle 62 of the air valve 61 on the nitrogen inlet pipe 5 They are hingedly connected by a connecting rod 73, and both ends of the connecting rod 73 are movably connected to the ends of the two rotating handles 62. The initial states of the air valve 61 of the nitrogen inlet pipe 5 and the air valve 61 of the oxygen inlet pipe 6 are set to a reverse linkage relationship, that is, when the opening of the air valve 61 of the nitrogen inlet pipe 5 increases, the opening of the air valve 61 of the oxygen inlet pipe 6 is synchronously reduced. When the rotating handle 62 of the nitrogen inlet pipe 5 rotates, the pushing and pulling action of the connecting rod 73 drives the rotating handle 62 of the oxygen inlet pipe 6 to rotate synchronously in the opposite direction, that is, when the opening of the air valve 61 of the nitrogen inlet pipe 5 increases, the opening of the air valve 61 of the oxygen inlet pipe 6 is correspondingly reduced, and vice versa, thereby automatically increasing the nitrogen flow rate when the oxygen concentration is reduced, or automatically reducing the nitrogen flow rate when the oxygen concentration is increased, thereby realizing proportional adjustment of the opening of the dual gas circuits and ensuring the accuracy of oxygen concentration adjustment;

[0022] The drive unit of the control panel 21 is connected to the electric cylinder 7 in the linkage mechanism, and its control program is preset with an oxygen concentration threshold range and corresponding valve adjustment logic. When the data processing unit determines that the detected oxygen concentration deviates from the threshold range, the numerical control unit sends a command to the drive unit according to the control program, driving the stirring element to maintain uniform mixing of the reaction materials while controlling the movement of the electric cylinder 7 to adjust the valve opening, forming a closed-loop control chain of "detection-judgment-execution";

[0023] In the initial state, the valve 61 of the oxygen inlet pipe 6 is kept open to a certain degree (e.g., 30% opening), and oxygen is continuously injected to maintain the oxidation reaction; while the valve 61 of the nitrogen inlet pipe 5 is synchronously opened to a smaller degree (e.g., 10% opening) to dilute the oxygen concentration and adjust the gas flow stability.

[0024] The working principle is: when the device is started, the driving unit in the control panel 21 drives the stirring element to rotate, so that the materials in the reactor 1 are evenly mixed. The multiple oxygen detectors 3 can be set to monitor the oxygen concentration in different areas of the reactor 1 intermittently or in real time, and transmit the detection signal to the data processing unit of the control panel 21. After the data processing unit analyzes and processes the signal, the numerical control unit determines whether the current concentration is within the threshold range according to the preset program. If the concentration is higher than the threshold, the numerical control unit controls the electric cylinder 7 to extend the driving rod, push the push rod 71 to drive the handle 62 of the nitrogen inlet pipe 5 to rotate, so that the nitrogen inlet pipe 5 is filled with gas. The opening of valve 61 increases, and at the same time, the connecting rod 73 drives the rotating handle 62 of the oxygen inlet pipe 6 to rotate in the opposite direction, so that the opening of the valve 61 of the oxygen inlet pipe 6 decreases, the amount of nitrogen introduced increases while the amount of oxygen introduced decreases, and the oxygen concentration in the reactor 1 is reduced; if the concentration is lower than the threshold value, the driving rod of the electric cylinder 7 contracts, driving the opening of the valve 61 of the nitrogen inlet pipe 5 to decrease and the opening of the valve 61 of the oxygen inlet pipe 6 to increase, thereby increasing the oxygen concentration. During the whole process, the porous air film 41 buffers the air flow fluctuations to ensure smooth concentration regulation, and ultimately realizes accurate monitoring and stable regulation of the oxygen content in the process of ternary precursor synthesis, thereby ensuring the consistency of oxidation quality.

[0025] Example 2

[0026] On the basis of Example 1, Figure 1 As shown, it also includes a gas guide seat 2 8, a glass tube 81, a float 82, a fan-shaped scale plate 9 and a pointer 91. The gas guide seat 2 8 is installed on the side of the end cover 2 away from the gas guide seat 1 4. The gas guide seat 2 8 has the same structure as the gas guide seat 1 4. The lower part of the gas guide seat 2 is also provided with a perforated air film 41, which can buffer the gas entering the glass tube 81 and prevent the air flow fluctuation from affecting the stability of the float 82; the glass tube 81 is vertically provided on the gas guide seat 2 8. The interior of the glass tube 81 is connected to the internal space of the gas guide seat 2 8, so that the gas in the reactor 1 can The gas enters the glass tube 81 through the second gas guide seat 8. A float 82 is provided in the glass tube 81. The float 82 is made of a hollow and lightweight material. Its density is less than that of the mixed gas in the reactor 1. When the oxygen concentration in the reactor 1 changes, the density of the mixed gas will change accordingly. Specifically, when the oxygen concentration increases, the density of the mixed gas increases, and when the concentration decreases, the density decreases. The buoyancy of the float 82 changes accordingly, causing it to float up and down in the glass tube 81. The change in the position of the float 82 directly reflects the oxygen content.

[0027] Among them, such as Figure 1 and Figure 2 As shown, a fan-shaped scale plate 9 is fixedly installed on the upper part of each air valve 61, and an angle scale is set on the fan-shaped scale plate 9 to mark the precise position of the valve opening; a pointer 91 is provided on each turning handle 62, and the pointer 91 points to the corresponding scale of the fan-shaped scale plate 9 on the same air valve 61, so as to clearly indicate the specific opening angle of the current air circuit valve, so that the operator can directly observe the valve status.

[0028] Among them, the float 82 in the glass tube 81 can be set as a magnetic float 82, and a linear Hall sensor array is set on the inner wall of the glass tube 81 accordingly. The linear Hall sensor array is electrically connected to the data processing unit of the control panel 21. When the magnetic float 82 floats up and down with the change of oxygen concentration, the Hall sensor array calculates the oxygen concentration value by detecting the displacement change of the float magnetic field. This concentration value is cross-validated with the data of the oxygen detector 3, further improving the accuracy of concentration monitoring.

[0029] like Figure 2 As shown, a porous air membrane 41 is provided in the lower part of the gas guide seat 4. The porous air membrane 41 can be made of fluororubber or polytetrafluoroethylene that is resistant to oxidation and has good flexibility. It can withstand the corrosive gases and a certain temperature environment that may exist in the reactor. It is not easy to age and break due to long-term contact with gas or slight pressure changes. At the same time, it has moderate elasticity. When the gas flow suddenly changes and produces pressure fluctuations, it can absorb the impact energy through its own micro-deformation, thereby stabilizing the airflow. Before the airflow passes through the gas guide seat 4 and enters the reaction cavity, it will first pass through the porous air membrane 41. The porous air membrane 41 is used to buffer and divert the gas entering the reactor 1, so that the gas is evenly diffused into the reaction cavity. At the same time, when the gas flow suddenly changes due to the adjustment of the gas valve 61, the porous air membrane 41 can absorb the pressure fluctuation through its own deformation, thereby avoiding sudden changes in oxygen concentration caused by airflow impact during the adjustment process, and effectively preventing overshoot of the adjustment.

[0030] Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art from this disclosure that various changes or modifications may be made to the present invention without departing from the principles and spirit of the present invention as defined in the claims. Therefore, the detailed description of the disclosed embodiments is intended to illustrate rather than limit the present invention, which shall be defined by the claims.

Claims

1. An oxygen content monitoring and regulating device for a ternary precursor synthesis device, comprising a reactor (1), an end cover (2), and a control panel (21); the reactor (1) is provided with a reaction cavity for accommodating reaction materials; a control panel (21) is provided on one side of the front of the reactor (1); and an end cover (2) is installed on the upper portion of the reactor (1); Its characteristics are: The apparatus further comprises an oxygen detector (3), a gas guide seat (4), a nitrogen inlet pipe (5), an oxygen inlet pipe (6), a gas valve (61) and a rotating handle (62). The end cover (2) is provided with an oxygen detector (3), and the detection end of the oxygen detector (3) extends into the reaction cavity inside the reactor (1) to monitor the change of oxygen concentration during the reaction process. A gas guide seat (4) is provided on one side of the top of the end cover (2). The gas guide seat (4) is a hollow structure and is connected to the internal space of the reactor (1) for introducing the gas required for the reaction. The gas guide seat (4) is connected to and communicates with a nitrogen inlet pipe (5) and an oxygen inlet pipe (6), and the gas paths of the nitrogen inlet pipe (5) and the oxygen inlet pipe (6) are both provided with gas valves (61), and the gas valves (61) are both provided with handles (62), and the gas path openings in the corresponding pipelines can be adjusted by rotating the handles (62). The end cover (2) is provided with a linkage mechanism, and the linkage mechanism is used to synchronously rotate the handles (62) of the gas valves (61) on the nitrogen inlet pipe (5) and the oxygen inlet pipe (6) to simultaneously adjust the gas path openings of the two.

2. The oxygen content monitoring and regulating device for a ternary precursor synthesis device according to claim 1, characterized in that: The linkage mechanism includes an electric cylinder (7), a push rod (71), a top block (72) and a connecting rod (73). The electric cylinder (7) is provided on one side of the end cover (2) close to the nitrogen inlet pipe (5). The end of the driving rod of the electric cylinder (7) is fixedly connected to the push rod (71). The push rod (71) is composed of a connecting block and a limit frame. The lower part of the handle (62) of the gas valve (61) on the nitrogen inlet pipe (5) is provided with a top block (72). The lower end of the top block (72) is embedded in the limit frame. The driving rod of the electric cylinder (7) is extended and retracted. When in operation, the push rod (71) drives the rotating handle (62) on the nitrogen inlet pipe (5) to rotate; the rotating handle (62) of the gas valve (61) on the oxygen inlet pipe (6) and the upper part of the rotating handle (62) of the gas valve (61) on the nitrogen inlet pipe (5) are hingedly connected by a connecting rod (73). When the rotating handle (62) on the nitrogen inlet pipe (5) rotates, the rotating handle (62) on the oxygen inlet pipe (6) is driven by the connecting rod (73) to rotate synchronously in the opposite direction or in the same direction, thereby realizing the linkage adjustment of the gas path opening of the two.

3. The oxygen content monitoring and regulating device for a ternary precursor synthesis device according to claim 2, characterized in that: A plurality of oxygen detectors (3) are provided, each detecting different areas inside the reactor (1) to obtain the oxygen concentration distribution state inside the reactor (1).

4. The oxygen content monitoring and regulating device for a ternary precursor synthesis device according to claim 3, characterized in that: The invention also includes a second air guide seat (8), a glass tube (81), a float (82), a fan-shaped scale plate (9) and a pointer (91). The second air guide seat (8) is installed on the side of the end cover (2) away from the first air guide seat (4). The second air guide seat (8) has the same structure as the first air guide seat (4). A glass tube (81) is vertically provided on the second air guide seat (8). The interior of the glass tube (81) is connected to the internal space of the second air guide seat (8). A float (82) is floatingly provided in the glass tube (81); a fan-shaped scale plate (9) is fixedly installed on the upper part of each air valve (61), and an angle scale is provided on the fan-shaped scale plate (9) for marking the precise position of the valve opening; a pointer (91) is provided on each turning handle (62), and the pointer (91) points to the corresponding scale of the fan-shaped scale plate (9) on the same air valve (61) to indicate the specific opening angle of the current air path valve.

5. The oxygen content monitoring and regulating device for a ternary precursor synthesis device according to claim 4, characterized in that: It also includes a perforated air film (41), and the lower part of the air guide seat (4) is provided with a perforated air film (41).

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